How Long Does Caffeine Last?

A cup of hot tasty coffee is obviously pleasing to all of us. And when we drink coffee, we can never deny its main ingredient- caffeine. It is obviously caffeine, which always helps us to get stimulated. However, regular coffee drinkers often want to understand whether caffeine can generate an effect on their body. Does caffeine affect positively or negatively?

However, everything is related to another question – How long does caffeine stay in your system?

The particular amount of coffee that you drink regularly is, in fact, not same as that of the others. Thus, the caffeine amount tends to vary.

Moreover, it is also differs, depending on how you prepare the coffee. For instance, there is a drip technique that prepares a drink with caffeine of about 115 mgs (five-ounce cup). On the other hand, for coffee powders, this amount is not so high.

Before knowing about caffeine’s effect, let us understand- how does caffeine work? After ingesting caffeine, the substance gets absorbed instantly with GI path. It reaches different areas of your body through bodily liquid.  You can ingest almost ninety nine percent of caffeine within forty five minutes. Plasma level reaches the highest point within about two hours. After ingesting caffeine, you may not find instant effect on liver, and it suggests that caffeine cannot be metabolized prior to its circulation all over your body.

For how much time caffeine remains in your body?

At times, it may happen that you have abruptly quitted your habit of sipping coffee. In that case, you can have some symptoms. Such impacts of discontinuation possibly exist as long as there is caffeine, present in your body. Most of the scientific studies indicate that in average caffeine may stay in the body of healthy person for about three to five hours.

Although half of the substance may get removed from system within about five hours, some more days are needed for the elimination of caffeine. In other words, period of clearance of caffeine is considerably accelerated, depending on every person.

The main issue turns up, while you sip a number of other beverages that have caffeine. Many beverage lovers are found to drink tea or coffee in morning time and in afternoon. These people have caffeine in their body throughout the day. For these people, caffeine may affect negatively. It increases stress hormone and distresses adrenal glands.

If you want to find the time period for which the effects of caffeine may remain in the body, there are some factors to be considered.

Age of the users

In every morning, you perhaps drink one cup of coffee with your parents. But, the rate at which the caffeine amount is excreted or metabolized is not same for all of you. Thus, from this result, you can realize that the stability of caffeine’s effect may vary, as per, the age of persons, sex, liver condition and many more.

The speed of clearing caffeine gets boosted up with an increase of age. In case of the aged persons, the capacity for metabolizing caffeine is lowered by almost thirty three percent. The young kids may have the possibility of processing this substance very slowly.


When you are pregnant, you must take avoid caffeine as much as possible. Almost one hundred fifty to two hundred milligrams may be safe; however, some doctors suggest pregnant ones to keep away from it altogether because the duration for which caffeine stays in mother’s body is also applicable in case of baby.

Your body weight – Fat or slim

The weight and height of your body may also be considered as the factor for clearing caffeine. If you are tall, then you have a chance to metabolize the substance faster.

Generally, if the caffeine that you take is higher (according to the size of your body), then you can clear it very slowly. Similarly, fat persons may treat caffeine at a quicker rate.

Gene-related factor

It is such a factor, which determines not only the caffeine’s effects but also the excretion of drugs and metabolizing ability. A research has shown that people with definite genes clear caffeine almost forty times faster rate than others.

Food you have consumed

Caffeine absorption is also affected with the existence of various food particles in your body. If you drink coffee in morning without eating any other thing previously, then the absorption rate is faster.

On the other hand, while you have consumed caffeine, after having nutritional fibre, then this speed is lower.

Caffeine amount – best for you

To avoid the negative sides of coffee, you should at first make out- How much caffeine in a cup of coffee is perfect for you? It means that you have to know the recommend amount of coffee for better results. Regular coffee drinking may help in preventing asthma, colon cancers and many such disorders.

Adult coffee drinkers – In case of matured persons, the reasonable caffeine amount is almost two hundred to three hundred milligrams. To say alternatively, you may drink two to three cups of beverage.

Teenagers – The kids must not have coffee; the teenagers may be take coffee by blending it. But, it should not cross 100 milligram.

However, it is to be said that we cannot suggest a quantity of caffeine that is safe for you. For some people 4 cups are extreme, while others feel nervous after drinking just a single cup.

Can excessive caffeine affect you?

Are you feeling that you have consumed extreme amount of coffee? If so, then the caffeine may stay for a very long time, and cause some distasteful effects- like

Osteoporosis – It is caused mainly in regular women coffee drinkers.

Stomach ache – Because of extreme gastric acid, you may feel pain.

Addictive sensation – When you skip cups of preferred, you may feel insomnia and exhaustion.

Tips to avoid negative impacts of caffeine:

  • Be careful of the level of caffeine that you take from beverage and food.
  • Reduce the amount slowly – Keep away from caffeine-based drinks
  • Examine the drug before utilizing – Some of the pain killers have 130 milligrams of caffeine in just a single dosage. Make use of a pill with no caffeine.

Thus, from the above discussion, you can recognize – what does caffeine do to your body or how long does it exist in the system.

Moreover, be careful about caffeine intake because in some cases the effects start instantly.

However, at some other times, there is a long term effect. So, caffeine is best only if you consume it in right amount.